Alert archive / Tennessee / Areal Flood Advisories in 2021

Areal Flood Advisory 13, NWS Nashville, TN

March 25, 2021Lewis County, Perry County, Wayne County, Tennessee

NWS Nashville, TN issued this areal flood advisory at Mar 25, 2021, 7:12 PM CDT for Lewis County, Perry County, Wayne County, Tennessee. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Mar 25, 2021, 7:12 PM CDT (00:12 UTC)
Expired: Mar 25, 2021, 9:15 PM CDT
In force: 2 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Lewis County, TN, Perry County, TN, Wayne County, TN

The radar

The Nashville radar (KOHX), 135 km from the middle of the area, began a volume at 00:13 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 0.2 hours before the alert went out and 124 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 290 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 615 m above ground
0-6 km bulk shear: 85 kt
0-1 km storm-relative helicity: 657 m²/s²
0-3 km storm-relative helicity: 631 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 7.4

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Nashville, TN wrote its last area forecast discussion before this areal flood advisory went out at Mar 25, 7:03 PM CDT, 9 minutes earlier.

Area forecast discussion, Mar 25, 7:03 PM CDT, 9 minutes before

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Hazardous weather outlook, Mar 25, 4:38 PM CDT, 2 hours 34 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Nashville TN
438 PM CDT Thu Mar 25 2021

TNZ005>011-023>034-056>066-075-077>080-093>095-261000-
Stewart-Montgomery-Robertson-Sumner-Macon-Clay-Pickett-Houston-
Humphreys-Dickson-Cheatham-Davidson-Wilson-Trousdale-Smith-Jackson-
Putnam-Overton-Fentress-Perry-Hickman-Lewis-Williamson-Maury-
Marshall-Rutherford-Cannon-De Kalb-White-Cumberland-Bedford-Coffee-
Warren-Grundy-Van Buren-Wayne-Lawrence-Giles-
438 PM CDT Thu Mar 25 2021

This Hazardous Weather Outlook is for Middle Tennessee.

.DAY ONE...Remainder of this Afternoon and Tonight.

Severe thunderstorms are likely across Middle Tennessee remainder
of this afternoon into evening hours. Severe thunderstorms will be
capable of producing damaging wind gusts of 60 mph or greater, large
hail, and tornadoes, of which a couple could be long-track.

A Flash Flood Watch is in effect for all of Middle Tennessee until
1 AM CDT Friday. Multiple rounds of heavy rainfall will cause
excessive rainfall amounts of 1 to 3 inches, with locally higher
amounts of around 4 inches possible.

A Wind advisory is in effect for all of Middle Tennessee until
4 AM CDT Friday. Southwest winds of 20 to 30 mph are expected
with localized gusts to around 40 mph possible.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Strong to severe storms are possible on Saturday across all of Middle
Tennessee. Damaging wind gusts and hail are the main threats with
these storms.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed. Please relay any
information about observed severe weather to the NWS while
following all local, state, and CDC guidelines.

Spotter Thunderstorm Reporting Criteria...
Tornado
Funnel Cloud
Flooding
Hail >= 1/2 Inch
Winds > 50 MPH (Measured)
Structural Damage
Trees or Power Lines Down

JB Wright

In the hours before

Local storm report, Mar 25, 5:10 PM CDT, 2 hours 2 minutes before

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Local storm report, Mar 25, 5:17 PM CDT, 1 hour 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
517 PM CDT THU MAR 25 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0514 PM     HAIL             2 N WHITE HOUSE         36.50N  86.65W
03/25/2021  M2.00 INCH       ROBERTSON          TN   SOCIAL MEDIA

            LARGE HAIL REPORT FROM 37048 ABOVE RIDGE.

&&

EVENT NUMBER OHX2100318

CMA

Local storm report, Mar 25, 5:20 PM CDT, 1 hour 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
520 PM CDT THU MAR 25 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0519 PM     HAIL             PORTLAND                36.59N  86.52W
03/25/2021  E1.50 INCH       SUMNER             TN   SOCIAL MEDIA

            TSPOTTER REPORT OF 1.5" ESTIMATED HAIL FROM PORTLAND.

&&

EVENT NUMBER OHX2100319

CMA

Local storm report, Mar 25, 5:24 PM CDT, 1 hour 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
524 PM CDT THU MAR 25 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0522 PM     TSTM WND DMG     2 E NASHVILLE           36.17N  86.75W
03/25/2021                   DAVIDSON           TN   SOCIAL MEDIA

            LARGE TREES DOWN IN EAST NASHVILLE OFF OF RIVERSIDE AND
            CARTER.

&&

EVENT NUMBER OHX2100320

CMA

Special weather statement, Mar 25, 6:40 PM CDT, 32 minutes before

Special Weather Statement
National Weather Service Nashville TN
640 PM CDT Thu Mar 25 2021

TNZ007-260000-
Robertson TN-
640 PM CDT Thu Mar 25 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN ROBERTSON COUNTY
UNTIL 700 PM CDT...

At 640 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Springfield, moving northeast at 80 mph.

Half inch hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Springfield and Orlinda.

A Tornado Watch remains in effect until 1100 PM CDT for Middle
Tennessee.

LAT...LON 3665 8670 3649 8685 3659 8703 3665 8699
TIME...MOT...LOC 2340Z 214DEG 68KT 3661 8689

Rose

Special weather statement, Mar 25, 6:55 PM CDT, 17 minutes before

Special Weather Statement
National Weather Service Nashville TN
655 PM CDT Thu Mar 25 2021

TNZ025>027-057-059-260030-
Hickman TN-Williamson TN-Dickson TN-Davidson TN-Cheatham TN-
655 PM CDT Thu Mar 25 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN DAVIDSON...
SOUTHEASTERN DICKSON...NORTHWESTERN WILLIAMSON...SOUTH CENTRAL
CHEATHAM AND CENTRAL HICKMAN COUNTIES UNTIL 730 PM CDT...

At 655 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles south of Centerville, moving northeast at 65 mph.

Half inch hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Dickson, Centerville, White Bluff, Kingston Springs, Pegram, Burns,
Fairview, Bon Aqua, Primm Springs, Lyles and Nunnelly.

This includes the following highways...
 Interstate 40 between mile markers 171 and 193.
 Interstate 840 between mile markers 1 and 12.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

A Tornado Watch remains in effect until 1100 PM CDT for Middle
Tennessee.

LAT...LON 3621 8720 3604 8694 3584 8718 3585 8721
      3585 8722 3580 8722 3562 8743 3562 8747
      3563 8750 3563 8753 3570 8764
TIME...MOT...LOC 2355Z 219DEG 54KT 3571 8750

Rose

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 25, 7:04 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis, Maury, Williamson	26 min
Mar 25, 7:04 PM CDT	Tornado Warning	OHX	Lewis, Perry, Wayne	41 min
Mar 25, 7:27 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis, Maury, Williamson	9 min
Mar 25, 7:36 PM CDT	Tornado Warning	OHX	Lawrence, Lewis, Maury, Wayne	39 min
Mar 25, 7:39 PM CDT	Special Weather Statement	OHX	Trousdale, Williamson	36 min
Mar 25, 7:50 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	40 min
Mar 25, 7:52 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Williamson	38 min
Mar 25, 8:13 PM CDT	Tornado Warning	OHX	Davidson, DeKalb, Rutherford, Smith, Williamson, Wilson	32 min
Mar 25, 8:35 PM CDT	Tornado Warning	OHX	Bedford, Marshall, Maury, Rutherford, Williamson	25 min
Mar 25, 8:41 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Giles, Marshall, Maury, Rutherford	34 min
Mar 25, 8:41 PM CDT	Tornado Warning	OHX	Smith, Trousdale, Wilson	34 min
Mar 25, 8:49 PM CDT	Tornado Warning	OHX	Rutherford	26 min
Mar 25, 9:01 PM CDT	Tornado Warning	OHX	Jackson, Macon, Smith	14 min
Mar 25, 9:09 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Rutherford, Smith, Wilson	36 min
Mar 25, 9:40 PM CDT	Severe Thunderstorm Warning	OHX	DeKalb, Putnam, White	35 min
Mar 25, 9:53 PM CDT	Areal Flood Advisory	OHX	Davidson	3 hr
Mar 25, 9:54 PM CDT	River Flood Advisory	OHX	Davidson	3 hr
Mar 25, 9:57 PM CDT	River Flood Advisory	OHX	Davidson	3 hr
Mar 25, 10:22 PM CDT	Special Weather Statement	OHX	Fentress, Overton, Pickett, White	38 min
Mar 25, 10:37 PM CDT	Special Weather Statement	OHX	Cumberland	38 min
Mar 25, 10:37 PM CDT	Special Weather Statement	OHX	Grundy, Van Buren	23 min
Mar 26, 5:58 PM CDT	Flash Flood Watch	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 32 more	42 hr

Nearby

Areal Flood Advisories in Tennessee, 2021 Every areal flood advisory in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.